Re: [PATCH v3] tools/perf/metricgroup: Fix printing event names of metric group with multiple events incase of overlapping events

[Jiri Olsa <jolsa@redhat.com>]

On Fri, Jan 31, 2020 at 10:55:22AM +0530, Kajol Jain wrote:

SNIP

>  				ev->metric_leader = metric_events[i];
>  			}
> +			j++;
>  		}
> +		ev = metric_events[i];
> +		evlist_used[ev->idx] = true;
>  	}
>  
>  	return metric_events[0];
> @@ -160,6 +161,9 @@ static int metricgroup__setup_events(struct list_head *groups,
>  	int ret = 0;
>  	struct egroup *eg;
>  	struct evsel *evsel;
> +	bool evlist_used[perf_evlist->core.nr_entries];
> +
> +	memset(evlist_used, 0, perf_evlist->core.nr_entries);

I know I posted this in the previous email, but are we sure bool
is always 1 byte?  would sizeod(evlist_used) be safer?

other than that it looks ok

Andi, you're ok with this?

thanks,
jirka

>  
>  	list_for_each_entry (eg, groups, nd) {
>  		struct evsel **metric_events;
> @@ -170,7 +174,7 @@ static int metricgroup__setup_events(struct list_head *groups,
>  			break;
>  		}
>  		evsel = find_evsel_group(perf_evlist, eg->ids, eg->idnum,
> -					 metric_events);
> +					 metric_events, evlist_used);
>  		if (!evsel) {
>  			pr_debug("Cannot resolve %s: %s\n",
>  					eg->metric_name, eg->metric_expr);
> -- 
> 2.21.0
>